Module com.headius.invokebinder

Package com.headius.invokebinder.transform

Class Transform

java.lang.Object

com.headius.invokebinder.transform.Transform

Direct Known Subclasses:

Cast, Catch, Collect, Convert, Drop, Filter, FilterReturn, Fold, Insert, Permute, Spread, TryFinally, Varargs

public abstract class Transform
extends Object

Abstract reprensentation of some handle transform.

Constructor Summary

Constructors

Constructor	Description
Transform()

Method Summary

Modifier and Type	Method	Description
protected static void	buildClassArgument(StringBuilder builder, Class cls)	Build Java code to represent a single .class reference.
protected static void	buildClassArguments(StringBuilder builder, Class<?>[] types)	Build a list of argument type classes suitable for inserting into Java code.
protected static void	buildClassCast(StringBuilder builder, Class cls)	Build Java code to represent a cast to the given type.
protected static void	buildPrimitiveJava(StringBuilder builder, Object value)	Build Java code to represent a literal primitive.
abstract MethodType	down(MethodType source)	Apply this transform downward from an incoming MethodType, producing a new type.
static String	generateMethodType(MethodType source)	Build Java code appropriate for standing up the given MethodType.
abstract String	toJava(MethodType incoming)	Return a Java code representation of this transform.
abstract String	toString()	Return a string representation of this transform.
abstract MethodHandle	up(MethodHandle target)	Apply this transform upward from the given MethodHandle, producing a new handle.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

Transform

public Transform()

Method Detail

up

public abstract MethodHandle up(MethodHandle target)

Apply this transform upward from the given MethodHandle, producing a new handle.

Parameters:

target - the target handle

Returns:

the adapted handle

down

public abstract MethodType down(MethodType source)

Apply this transform downward from an incoming MethodType, producing a new type.

Parameters:

source - the source type

Returns:

the new type

toString

public abstract String toString()

Return a string representation of this transform.

Overrides:

toString in class Object

Returns:

a string representation of this transform

toJava

public abstract String toJava(MethodType incoming)

Return a Java code representation of this transform.

Returns:

a Java code representation of this transform.

buildClassArguments

protected static void buildClassArguments(StringBuilder builder,
                                          Class<?>[] types)

Build a list of argument type classes suitable for inserting into Java code. This will be an argument list of the form "pkg.Cls1.class, pkg.Cls2[].class, primtype.class, ..."

Parameters:

builder - the builder in which to build the argument list

types - the classes from which to create the argument list

buildClassArgument

protected static void buildClassArgument(StringBuilder builder,
                                         Class cls)

Build Java code to represent a single .class reference. This will be an argument of the form "pkg.Cls1.class" or "pkg.Cls2[].class" or "primtype.class"

Parameters:

builder - the builder in which to build the argument

cls - the type for the argument

buildClassCast

protected static void buildClassCast(StringBuilder builder,
                                     Class cls)

Build Java code to represent a cast to the given type. This will be an argument of the form "(pkg.Cls1)" or "(pkg.Cls2[])" or "(primtype)"

Parameters:

builder - the builder in which to build the argument

cls - the type for the argument

buildPrimitiveJava

protected static void buildPrimitiveJava(StringBuilder builder,
                                         Object value)

Build Java code to represent a literal primitive. This will append L or F as appropriate for long and float primitives.

Parameters:

builder - the builder in which to generate the code

value - the primitive value to generate from

generateMethodType

public static String generateMethodType(MethodType source)

Build Java code appropriate for standing up the given MethodType.

Parameters:

source - the MethodType for which to build Java code

Returns:

Java code suitable for building the given MethodType